browser-use/browser-harness

Browser Harness ♞ Connect an LLM directly to your real browser through one editable CDP websocket. The agent writes missing helpers as it works, so the harness improves with every task. Try browser-harness in Browser Use Cloud or paste the setup prompt into your coding agent. ● agent: wants to upload a file │ ● agent-workspace/agent_helpers.py → helper missing │ ● agent writes it agent_helpers.py │ + custom helper ✓ file uploaded You will never use the browser again. See it work Task: "Open my X profile, find my latest 20 video posts, and download them." Setup prompt Paste into Claude Code or Codex: Install or upgrade browser-harness to the latest stable version with uv using Python 3.12, register the skill from `browser-harness skill`, and connect it to my browser. Ask whether I want local browser recordings enabled; default to no and preserve my existing preference on upgrades. Follow https://github.com/browser-use/browser-harness/blob/main/install.md if setup or connection fails. The agent will open chrome://inspect/#remote-debugging . On first setup, tick the checkbox so the agent can connect to your browser: How it works install.md connects the agent to your browser. SKILL.md teaches it the browser workflow. src/browser_harness/ stays protected while the agent writes reusable helpers in its local workspace. Scale with Browser Use Cloud Use your local browser for logged-in, personal work. When you want many browsers in parallel—with live previews, proxies, stealth, CAPTCHA solving, and more—scale with Browser Use Cloud . MCP server browser-harness-mcp exposes the browser control helpers as MCP tools over stdio, so any MCP client (Claude Code, Devin, Cursor, etc.) can drive the browser without writing a second CDP layer. See docs/MCP.md for setup and client configuration. Contributing Bug fixes, documentation improvements, and agent-generated domain skills are welcome. See CONTRIBUTING.md . The Bitter Lesson of Agent Harnesses · Web Agents That Actually Learn